Definition of "Rock" :
noun: pitching dangerously to one side
noun: a genre of popular music originating in the 1950s; a blend of black rhythm-and-blues with white country-and-western
"Rock is a generic term for the range of styles that evolved out of rock'n'roll.."
noun: hard bright-colored stick candy (typically flavored with peppermint)
noun: a lump or mass of hard consolidated mineral matter
"He threw a rock at me."
noun: (figurative) someone who is strong and stable and dependable
"He was her rock during the crisis."
noun: United States gynecologist and devout Catholic who conducted the first clinical trials of the oral contraceptive pill (1890-1984)
noun: material consisting of the aggregate of minerals like those making up the Earth's crust
"That mountain is solid rock."
verb: move back and forth or sideways
"The ship was rocking."
verb: cause to move back and forth
"Rock the cradle."